
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
    .box{
        position: absolute;
        width: 266px;
        height: 240px;
        left: 50%;
        transform: translateX(-50%);
        top: 200px;
        border-radius: 120px;
        overflow: hidden;
    }
    .img {
        position: absolute;
        width: 100%;
        height: 100%;
        background: url('./2.png') no-repeat center;
        background-size: cover;
        left: 100%;
        top: 100%;
        animation: identifier linear 1s  forwards infinite;
    }
    @keyframes identifier {
        from {
            left: 100%;
            top: 100%;
            opacity: 1;
            transform: scale(1);
        }
        to {
            left: -100%;
            top: -100%;
            opacity: 0;
            transform: scale(0);
        }
    }
    </style>
</head>
<body>
    <div class="box">
        <div class="img"></div>
    </div>
</body>
</html>
